Wan Ji Wan Hussin,  1982- <br/><br/>
Kezuhudan Umar Abdul Aziz dan kesederhanaan Nik Abdul Aziz / 
Wan Ji Wan Hussin 
 - Petaling Jaya, Selangor :  Penerbit Rijal Media,  2010 
 - xiv, 183 p. ;  22 cm. 
<br/><br/><label>ISBN: </label>9789675515019  RM19.00 
<br/><br/><label>Subjects--Personal Names: </label><br/>'Umar ibn'Abd al-'Aziz, Caliph,  d. 720 <br/>Nik Abdul Aziz Nik Mat, Dato' Haji,  1931-2015 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Islamic leadership<br/>Leadership--Religious aspects--Islam